Preheat your oven to 375°F (190°C). Get that heat going!
Assemble the Subs: Carefully slice the sub rolls open—but not all the way through—leaving a hinge on one side. Brush the insides lightly with Italian dressing. Layer the meats, cheese, onions, and banana peppers inside each roll.
Top & Bake: Place the sandwiches on a baking sheet lined with foil or parchment paper. In a small bowl, mix the melted butter, Italian seasoning, and garlic powder. Brush this mixture generously over the top of the rolls.
Bake for 12–15 minutes or until the cheese has melted and the tops of the rolls are golden brown.
Serve Hot: Slice the sandwiches if desired and serve with olives, chips, or a refreshing side salad!